condition mean min max ZT0-3 346.70000000000005 346.70000000000005 346.70000000000005 ZT4-7 423.9 423.9 423.9 ZT8-11 401.05 401.05 401.05 ZT12-15 410.75 410.75 410.75 ZT16-19 346.05 346.05 346.05 ZT20-23 331.75 331.75 331.75